Quite a lot of people don’t have enough vitamin D in their diet, for there are not very many natural low-calorie foods that contain much of it. Although mushrooms are a good natural source of the vitamin, its content is fairly low. Scientists working in collaboration with manufacturers conducted a series of experiments exposing mushrooms to ultraviolet ray treatment.

The results came as a great surprise – the vitamin content increased by 700%. Moreover, the ultraviolet treatment didn’t affect the levels of vitamin C, niacin, folic acid, riboflavin and many other wholesome nutrients. That means that mushrooms don’t lose other salubrious compounds after the treatment.